TY - CHAP A1 - Zentgraf, Hanswalter A1 - Scheer, Ulrich A1 - Franke, Werner W. T1 - On the existence of arrested transcriptional machinery in late stages of avian erythropoiesis N2 - No abstract available Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33696 ER - TY - CHAP A1 - Scheer, Ulrich A1 - Trendelenburg, M. F. A1 - Franke, Werner W. T1 - Regulation of transcription of ribosomal RNA genes during amphibian oogenesis N2 - No abstract available Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33700 ER - TY - JOUR A1 - Trendelenburg, Michael F. A1 - Scheer, Ulrich A1 - Zentgraf, Hanswalter A1 - Franke, Werner W. T1 - Heterogeneity of spacer lengths in circles of amplified ribosomal DNA of two insect species, Dytiscus marginalis and Acheta domesticus N2 - No abstract available Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33055 ER - TY - JOUR A1 - Klitzing, K. von A1 - Becker, Charles R. T1 - Far infrared photoconductivity of residual acceptors in pure tellurium N2 - The photoconductivity of both undeformed and deformed Te samples has been investigated at liquid He temperature by means of a Fourier spectrometer. Three peaks were usually found in the spectra of undeformed samples at 11, 24 and 46 cm\(^{-1}\). These are shown to be due to three different chemical impurities. The deformed samples are characterized by additional structure at higher frequencies. Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31278 ER - TY - JOUR A1 - Köhler, H. A1 - Becker, Charles R. T1 - Infrared-active lattice vibrations in SnSe\(_2\) N2 - No abstract available Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30838 ER - TY - JOUR A1 - Franke, Werner W. A1 - Scheer, Ulrich A1 - Trendelenburg, Michael F. A1 - Spring, Herbert A1 - Zentgraf, Hanswalter T1 - Absence of nucleosomes in transcriptionally active chromatin N2 - The ultrastructure of twO kinds of transcription ally active chromatin, the lampbrush chromosome loops and the nucleoli from amphibian oocytes and primary nuclei of the green alga Acetabularia, has been examined after manual isolation and dispersion in low salt media of slightly alkaline pH using various electron microscopic staining techniques (positive staining, metal shadowing, negative staining, preparation on positively charged films, etc.) and compared with the appearance of chromatin from various somatic cells (hen erythrocytes, rat hepatocytes, ClIltured murine sarcoma cells) prepared in parallel. While typical nucleosomes were revealed with all the techniques for chromatin from the latter three cell system, no nucleosomes were identified in either the lampbrush chromosome structures or the nucleolar chromatin. Nucleosomal arrays were absent not only in maximally fibril-covered matrix units but also in fibril-free regions between transcriptional complexes, including the apparent spacer intercepts between different transcriptional units. Moreover, comparisons of the length of the repeating units of rDNA in the transcribed state with those determined in the isolated rDNA and with the lengths of the first stable product of rDNA transcription, the pre-rRNA, demonstrated that the transcribed rDNA was not significantly shortened and/or condensed but rather extended in the transcriptional units. Distinct granules of about nucleosomal size which were sometimes found in apparent spacer regions as well as within matrix units of reduced fibril density were shown not to represent nucleosomes since their number per spacer unit was not inversely correlated with the length of the specific unit and also on the basis of their resistance to treatment with the detergent Sarkosyl NL-30. It is possible to structurally distinguish between transcriptionally active chromatin in which the DNA is extended in a non-nucleosomal form of chromatin and condensed, inactive chromatin within the typical nucleosomal package. The characteristic extended structure of transcriptionally active chromatin is found not only in the transcribed genes but also in non-transcribed regions within or between ("spacer") transcriptional units as well as in transcriptional units that are untranscribed amidst transcribed ones and/or have been inactivated for relatively short time. It is hypothesized that activation of transcription involves a transition from a nucleosomal to an extended chromatin organisation and that this structural transition is not specific for single "activated" genes but may involve larger chromatin regions, including adjacent untranscribed intercepts. KW - Cytologie KW - Chromatin structure KW - nucleosomes KW - transcription KW - electron microscopy Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-40646 ER - TY - CHAP A1 - Scheer, Ulrich A1 - Franke, Werner W. T1 - Transcriptional complexes of nucleolar genes N2 - No abstract available Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-41072 ER - TY - BOOK A1 - Krüger, Hans-Peter T1 - Soziometrie in der Schule: Verfahren und Ergebnisse zu sozialen Determinanten der Schülerpersönlichkeit N2 - No abstract available KW - Soziometrie KW - Schule KW - Schulklasse KW - Soziometrie KW - Schüler KW - Persönlichkeit Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-40897 SN - 3-407-51109-4 ER - TY - JOUR A1 - Hommers, Wilfried T1 - Zur Frage der Anwendungsbedingungen der Erwartungsmaximierung bei Entscheidungen über Spiele gegen die Natur N2 - Von Aussagen von Vpn ausgehend wird eine Erklärung für die Nichtanwendung der Erwartungsmaximierung in Entscheidungen zwischen Spielen gegen die Natur gegeben, die in einer Untersuchung empirisch bestätigt wurde. Danach hängt die Verwendung der Erwartungsmaximierung von situationalen Bedingungen ab, die den Vpn eine Anwendung des Wahrscheinlichkeitsbegriffs für eine Menge gleichartiger Zufalls experimente nahelegen. Der Befund der Untersuchung kann auch durch die PortfolioTheorie erklärt werden. Zur Beseitigung dieses Dilemmas wird auf die Introspektion zurückgegriffen. N2 - An experimental study of the choice behaviour reported in the present paper, showed that the subjects do not choose the obviously most suitable alternative in a gambling situation. The choice of the obviously most suitable alternative depends upon the application of the cOJ1cept of prob ability by the subjects upon a number of similar chance experiments. Besides, the experimental results reported above, can also be explained 'on the basis of the portfolio theory. This discrepancy can, perhaps be resolved by considering introspection. Resume: L'auteur observe que ses sujets n'appliquent pas, dans des jeux de hasard la strategie qui conduirait a une maximisation des gains. D'apres les explications des sujets, l'application d'une strategie de maximisation dependrait de la situation, a savoir d'une constellation de faits, qui font penser que l'experience obeit aux lois du hasard et se repetera plusieurs fois et de maniere analogue. On pourrait cependant tout aussi bien expliquer les m&mes comportements par la »theorie du portefeuille«. Se fondant sur les explications introspectives de ses sujets, l'auteur donne provisoirement sa preference a la premiere de ces deux explications. KW - Angewandte Psychologie KW - Experimentelle Psychologie Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-43917 ER - TY - JOUR A1 - Hommers, Wilfried A1 - Steller, Max A1 - Zienert, Hans-Joachim T1 - Möglichkeiten psychologischer Entlassungsvorbereitung bei jugendlichen Strafgefangenen : Forschungsprogramm eines Vollzugsversuchs - Modell-Lernen im Rahmen von Rollen-Trainings N2 - No abstract available KW - Strafvollzug Y1 - 1976 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-43906 ER -